Drill-socket.



I. F. GRABILL.

DRILL $0CKET. ,wvucn'lou FILED MAR. 14. 1911.

Patented Feb. 12, 1918.

JOHN F G'KHBILL.

"TEE

d Ed PATENT )HN F. GRABILL, 0F FLORA, ILLINOIS, ASSIGNOR 0F ONE-THIRD T0 EARL ARBUTHNG'Z AND ONE-THIRD T0 HORA'IIO C. CHAFFIN, BOTH 01" FLORA, ILLINOIS.

DRILL-SOCKET.

Specification of Letters Patent.

Patented Feb. 1%, i918.

Application filed March 14, 1917. Serial No. 154,849.

'lhis'invention relates to sockets :for ro-.

tatablc drills, reaniers, and like tools.

Sockets of this character are made in sets, each set comprising a plurality of sockets. Originally all of these sockets of a set were hollow, tapered, and annular in form to provide a tapering bore extending longitudinally oi the socket. Each socket tapered uniformly from one end to the other, except at the inner end where they were reduced in thckness and all that portion of a socket which is hollow has a wall of uniform thickness. Thcsockets of a set were graduated, as to size, that they nested, one within the other. Originally all the sockets of a set were annular in crossscction, that is, the inner wall was circular andlconcentric to the outer wall. Each one of these sockets was adapted to receive a drill of the proper size.

Later there came into use, a form of socket called the Use em up socket, dc.- signcd for engagement with the drill only, these sockets being formed in graduated sizes, each socket having a flattened tapering portion on its inner face to engage with the flattened portion of a drill and cause the unitary rotation of the drill with the socket. This last named socket was cvcntually'assd ciatcd in use with the original round socket but as a drill holding socket exclusively, and when this Use em up socket is used in conjunction with the set of round sockets, it required an extra socket for each of the difierent sizes of the 'Use cm up socket. The round socket and the last named socket are not sold with each other in sets but they are separately purchased and used together. The Use em up socket, however, was used only as the socket which engages or holds the drill. A disadvantage of this construction lies in the fact that for each set of these Use em up or drill sockets, five of the old type round sockets must be used as reducers in order to reduce to the size of the drill used so that a complete set of sockets consists of five round sockets and live drill or Use em up sockets associated with the old :torm of socket. Another disadvantage which is present in both forms of the sockets above described is that the socket, having a wall of uniform, thickness from its lower end to its upper and is very liable to break at the mouth of the socket.

One of the obj-acts of my invention is to reinforce the wall or the socket at its mouth so as to stand the strain to which it is sub grated. thereby very greatly increasing; the

life of the socket and a further object is to so construct the sockets that any one may be. used either as a drill socket or as a re,

ed to engage with each other or the drill.

Other objects will appear in the course of the following description.

My intention. is illustrated in the accoinpanying drawings, wherein:

Figure 1 is an elevation of a plurality of sockets and a drill, the sockets being; C011- structed in accordance with my invention, a drift bar being shown in dotted lines;

Fig. 2 is a vertical sectional view of the larger socket B on the line 2-2 of Fig. 1, the other sockets being shown in elevation; and a Fig. 3 is a section on the line 3 -3 of Fig. 2.

Referring to these drawings, it will be seen that my improved socket comprises a tapering body 10 reduced in thickness at its upper end as at 11. as usual, this tapering body being formed with a correspondingly tapering bore 12. lbs lower end of the socket body is thickened as at 13 so that the wall surrounding the lower portion of the bore 12 is approximately twice as thick as the wall surrounding the upper portion of the bore above the reiui orccd or thickcncd portion 13. This thickened wall '13 is approximately of uniform diameter. The body 10 is formed intermediate its ends with the transverse slot 14 which intersects the bore and proyides means whereby the drill may be driven out of the socket or one socket may be driven out of another socket.

The bore 12 is not truly circulas-but the inner face of the wall surrounding the more is formed with a flat portion 15. this flat portion extending upward from the month of the socket any desired distance. The exteribr face of the socket above the collar or thickened portion 13 also formed with duccr socket, the everal sockets being adaptfa Hat face 16 and it will be seen by reference to Fig. 8 that the side edges of the interior iace 15 and the side edues of the outer flat face 16 are so disposed that these side edges will be intersected by radial planes extending; "from. the axial center of the socket. According to my in\ ention there are a plurality of sockets for each set, graduated according to SRZC and so proportioned that a soliket ot' a certain size will f t snugly into the bore of a socket. of a size larger, with the tint outer face of the socket A in Fig. l coincid ing with the flat inner face 15 of the bore of socket B. This socket B may in turn be inserted in the bore ot a third socket and so on. the flat outer faces of the several sockit s' engaging with the flat inner faces of e bores of the several sockets and thus a rottition of one of the sockets will cause'a rotation of all the otlier sockets. In each case the extremities ll of one socket will intcrsect the slot 14 of the next larger socket so that a drifting-tool may be inserted in the slot 1 to dri\e one, socket out of anot er.

With the construction above descri eld, drills from which the tank or shank is b oken can be readily used up to the last possible point of service. With regard to the reinforced mouth of the socketyit may be stated that the socket. now in use which is made without a reinforced mouth frequently splits at the mouth and as soon as this'happens it becomes worthless. By reintorcing the mouth as I have done there is little chance of the socket splitting and in fact the drill would probably break before the socket splits its before stated, the drill holding sockets now used in association. with the round soclc ets has a bore flattened on one side in whicl the drill is disposed, this drill socl et,'how ever, does not have any flattened exterior snrtice but is ircular in cross section. The e is a single drill socket for --ach SlZi' of dri l used and this requires that there b ass)- c ated with the drill sockets, seriesl f round socke s, each having a. circular interior sur face, like the exterior of the socke i o; lin he drill. This series of round seek is in creases in size to the sizeneccssary to engage the drill press, thus in use with a set of five different sizes of drill holding sockets, there must be associated tire of the old round sockets in order that they may be nested one within the other in reducing'to the size of the drill to be used.

In my invention, the exterior of each socket from the reinforced mouth has exactly the same form in cross section as the interior of the socket into which it nests, thus in a set of tire drill sockets made in accordance with my intention, only fire sockets will be necessary, while in a set composed of the old round sockets and the drill holding sockets, there must be ten sockets to a set.

There are a number of difl erent drill presses n which, the drill spindles are of differenwizcs and for each of these different sizes, there must be a complete set of sockets, usually ranging from three to five sockets to a set. In each of these sets, as now used, there is one socket with a circular interior face to each one having a flattened interior face, making, therefore, in a three socket set, six sockets, and in a four socket set, eight sockets, and in a five socket set, ten sockets, all told. This inconvenience and expense is entirely done away with in my invention.

Having, described my invention, What 1 claim is:

A drill socket having a tapered hollow body, the bore of the ,body being tapered and formed to providen longitudinally extending flat face. the exterior face of the body having a Hat portion corresponding in position to the flattened face of the bore, the side edges of the interior flattened face and the side edges of the outer flattened face being so disposed as to be intersected by common planes extending radially from the axial centerot the socket.

In testimony whereof I hereunto affix my signature in'the presence of two Witnesses.

JOHN F. GRABILL.

Witnesses:

J. L. BOYLES, E. \V. BRYAN. 

